Rhabdomyolysis is a clinical and biochemical syndrome resulting from the acute necrosis of muscle fibers and the leak of cellular elements into circulation. It can usually develop after trauma and severe exercises. However, it may also occur following low intensity exercises. In our case, a 24-year-old man was admitted to our emergency department because of severe abdominal pain after low intensity bodybuilding exercise. The development of an acute exertional rhabdomyolysis was confirmed by the increased serum enzyme levels. The patient was treated with intravenous sodium chloride, and sodium bicarbonate. In patients admitted to the emergency room after trauma or intensive exercise who are suspected of having rhabdomyolysis, the serum creatine phosphokinase, creatinine and potassium levels should be evaluated and if found to be high, fluid treatment should be started early to avoid any potential complications.